Backpack



FIG. 1 is a perspective view of a backpack according to the embodiment of the present invention;

FIG. 2 is a front view of the backpack of FIG. 1 according to the embodiment of the present invention;

FIG. 3 is a side view of the backpack of FIG. 1 according to the embodiment of the present invention;

FIG. 4 is a another side view of the backpack of FIG. 1 according to the embodiment of the present invention; and,

FIG. 5 is a back view of the backpack of FIG. 1 according to the embodiment of the present invention.

The broken lines showing straps and zippers are included for the purpose of illustrating the embodiment of the invention as it would be in use, and form no part of the claimed design. 

The ornamental design for a backpack, as shown and described. 